Wakana Sakai (坂井 和奏, Sakai Wakana) is one of the main characters of Tari Tari series. She lives with her father and her pet cat, Dora. Her mother passed away a few years ago. She is part of the "Choir and Sometimes Badminton Club".

When she was in her last year of middle school, she was too focused on her exams and tended to lash out her emotions to her mother. At that time, she didn't know that her mother was sick. She now lives with regret for being unable to say "I'm going", "sorry", and "thank you" to her mother. She asked her father "Why didn't mother told me about that she was sick?" After she heard her father explain why, Wakana ran to her room crying about the piano that she told her father to throw it out has her mother's handmade keychain that was made for her. Ever since, Wakana seems to have found her resolution, and finally joins the choir club. Wakana had also finished the song that her mother had started to remove her regret of turning down her request to write a song together. Mahiru and Sakai's song is entitled Radiant Melody. Wakana becomes the Pink WestStop Ranger as well.